OT: Odd Problem! Your help welcome!



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Topic: Religions > Atheism
User: "Therion Ware"
Date: 15 Jun 2004 02:13:25 PM
Object: OT: Odd Problem! Your help welcome!
I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.
I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.
Suggestions welcome as to a good way to do this.
Thanks
TW.
--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.
.

User: "walksalone"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 03:32:19 PM
**** Post for FREE via your newsreader at post.usenet.com ****
On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Rotating weight, mass, torque?

Suggestions welcome as to a good way to do this.

Not knowing the usage, counter drill dead center a hole, 1/2 the Dia. of
the smaller rod, maybe 8mm deep. Solid steel pin & flat bearing are applied
in the following manner.
Sweat fit to one rod, slip in flat washer of appropriate size [see
blacksmith, machinist, or local mechanic to determine size of flat
bearing], sweat fit the other rod. & no, I am not going to ask what you are
going to do with that.
If you want the rods to rotate independently, make a washer stack, weld to
each rod, put floating pin & flat washer in middle,[imagine a shouldered
pin, a t shaped pin for the washers]like this I guess.
rod 1
washer stack,
flat bearing inside another washer,
washer stack,
rod 2
Now that is clear as mud, later.

Thanks
TW.

walksalone who does not want to know.
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User: "Christopher Allan"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 07:01:30 PM
Friction Welding is easy and you will basically have a solid rod no weak
welds or pins.
.


User: "*nemo*"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 07:25:11 PM
In article <5ciuc0tauk7idesgruk1gu4pun8vbkokq0@4ax.com>,
Therion Ware <autodelete@city-of-dis.com> wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.

Thanks
TW.
--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.

I'd get a metal cylinder, maybe 10 mm in diameter, 2-3 cm long. Drill a
hole in either end for 1/3 of the length, wide enough to fit a rod in
each end. Weld the rods into the holes. Might be ugly, but it should
hold...
--
Nemo - EAC Commissioner for Bible Belt Underwater Operations.
Atheist #1331 (the Palindrome of doom!)
BAAWA Knight! - One of those warm Southern Knights, y'all!
Charter member, SMASH!!
http://home.earthlink.net/~jehdjh/Relpg.html
Draco Dormiens Nunquam Titillandus
Quotemeister since March 2002
.

User: "Puck Greenman"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 03:30:27 PM
On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

If that is "rotational stress", as in torque; might you not be better
with tube?
A 5mm and a 6mm tube should "sweat" together nicely.

Suggestions welcome as to a good way to do this.

Thanks
TW.

Puck Greenman

#162

BAAWA Knight.

Blesed is the self righteous xtian,
for his is the sure and certain knowledge
that no matter what load of tripe he
comes out with:
God told him to say it.
.
User: "Therion Ware"

Title: Re: OT: Odd Problem! Your help welcome! 16 Jun 2004 12:58:41 AM
On Tue, 15 Jun 2004 21:30:27 +0100 in alt.atheism, Puck Greenman
(Puck Greenman <puck@pooks.hill.fey>) said, directing the reply to
alt.atheism

On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

If that is "rotational stress", as in torque; might you not be better
with tube?

Let me explain, he said. (And bear in mind there is a perfectly
sensible explanation for all this).
I have an electric motor. It's a US motor, and works on 110v. It
finally died, taking the transformer with it. So I get a new motor
flown in from Texas, and buy a new transformer, which allegedly
outputs 110v AC stabilised.
The new motor incinerates itself. Subsequent checking reveals the
transformer is actually outputting a very steady 124v. Which explains
why the new motor killed itself.
So, I think about this for a while, and find myself a UK electric
motor. But it's the wrong shape and will not fit into the original
housing. But it does have a rather long drive shaft. So I'm thinking
if I can join one drive shaft to the other, effectively using the UK
motor to turn the US but dead motor, which powers the equipment in
question) I'll have a temporary solution while I sue the crap out of
everyone in sight, particularly the transformer manufacturer.

A 5mm and a 6mm tube should "sweat" together nicely.

This seems like a very good idea, and I think I know where I can find
an appropriately sized tube!

Suggestions welcome as to a good way to do this.

Thanks
TW.


Puck Greenman

#162

BAAWA Knight.

Blesed is the self righteous xtian,
for his is the sure and certain knowledge
that no matter what load of tripe he
comes out with:
God told him to say it.

--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.
.
User: "MrD"

Title: Re: OT: Odd Problem! Your help welcome! 17 Jun 2004 10:13:32 PM
"Therion Ware" <autodelete@city-of-dis.com> wrote in message
news:jinvc01lg0uelt9ab22ge9esibj0dcegfe@4ax.com...



On Tue, 15 Jun 2004 21:30:27 +0100 in alt.atheism, Puck Greenman
(Puck Greenman <puck@pooks.hill.fey>) said, directing the reply to
alt.atheism



On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

If that is "rotational stress", as in torque; might you not be better
with tube?


Let me explain, he said. (And bear in mind there is a perfectly
sensible explanation for all this).

I have an electric motor. It's a US motor, and works on 110v. It
finally died, taking the transformer with it. So I get a new motor
flown in from Texas, and buy a new transformer, which allegedly
outputs 110v AC stabilised.

The new motor incinerates itself. Subsequent checking reveals the
transformer is actually outputting a very steady 124v. Which explains
why the new motor killed itself.

So, I think about this for a while, and find myself a UK electric
motor. But it's the wrong shape and will not fit into the original
housing. But it does have a rather long drive shaft. So I'm thinking
if I can join one drive shaft to the other, effectively using the UK
motor to turn the US but dead motor, which powers the equipment in
question) I'll have a temporary solution while I sue the crap out of
everyone in sight, particularly the transformer manufacturer.

A 5mm and a 6mm tube should "sweat" together nicely.


This seems like a very good idea, and I think I know where I can find
an appropriately sized tube!


Suggestions welcome as to a good way to do this.

How much room is there around the area you want to use?
.

User: "MrD"

Title: Re: OT: Odd Problem! Your help welcome! 17 Jun 2004 10:25:16 PM
"Therion Ware" <autodelete@city-of-dis.com> wrote in message
news:jinvc01lg0uelt9ab22ge9esibj0dcegfe@4ax.com...



On Tue, 15 Jun 2004 21:30:27 +0100 in alt.atheism, Puck Greenman
(Puck Greenman <puck@pooks.hill.fey>) said, directing the reply to
alt.atheism



On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

If that is "rotational stress", as in torque; might you not be better
with tube?


Let me explain, he said. (And bear in mind there is a perfectly
sensible explanation for all this).

I have an electric motor. It's a US motor, and works on 110v. It
finally died, taking the transformer with it. So I get a new motor
flown in from Texas, and buy a new transformer, which allegedly
outputs 110v AC stabilised.

The new motor incinerates itself. Subsequent checking reveals the
transformer is actually outputting a very steady 124v. Which explains
why the new motor killed itself.

So, I think about this for a while, and find myself a UK electric
motor. But it's the wrong shape and will not fit into the original
housing. But it does have a rather long drive shaft. So I'm thinking
if I can join one drive shaft to the other, effectively using the UK
motor to turn the US but dead motor, which powers the equipment in
question) I'll have a temporary solution while I sue the crap out of
everyone in sight, particularly the transformer manufacturer.

A 5mm and a 6mm tube should "sweat" together nicely.


This seems like a very good idea, and I think I know where I can find
an appropriately sized tube!

http://www.huco.com/
Has some very cool flexible couplers, made in the UK.
.
User: "Therion Ware"

Title: Re: OT: Odd Problem! Your help welcome! 18 Jun 2004 12:50:32 AM
On Thu, 17 Jun 2004 22:25:16 -0500 in alt.atheism, MrD ("MrD"
<nachobiznez@all.com>) said, directing the reply to alt.atheism


"Therion Ware" <autodelete@city-of-dis.com> wrote in message
news:jinvc01lg0uelt9ab22ge9esibj0dcegfe@4ax.com...



On Tue, 15 Jun 2004 21:30:27 +0100 in alt.atheism, Puck Greenman
(Puck Greenman <puck@pooks.hill.fey>) said, directing the reply to
alt.atheism



On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

If that is "rotational stress", as in torque; might you not be better
with tube?


Let me explain, he said. (And bear in mind there is a perfectly
sensible explanation for all this).

I have an electric motor. It's a US motor, and works on 110v. It
finally died, taking the transformer with it. So I get a new motor
flown in from Texas, and buy a new transformer, which allegedly
outputs 110v AC stabilised.

The new motor incinerates itself. Subsequent checking reveals the
transformer is actually outputting a very steady 124v. Which explains
why the new motor killed itself.

So, I think about this for a while, and find myself a UK electric
motor. But it's the wrong shape and will not fit into the original
housing. But it does have a rather long drive shaft. So I'm thinking
if I can join one drive shaft to the other, effectively using the UK
motor to turn the US but dead motor, which powers the equipment in
question) I'll have a temporary solution while I sue the crap out of
everyone in sight, particularly the transformer manufacturer.

A 5mm and a 6mm tube should "sweat" together nicely.


This seems like a very good idea, and I think I know where I can find
an appropriately sized tube!

http://www.huco.com/
Has some very cool flexible couplers, made in the UK.

Brilliant! And they're just down the road as well!!! Many thanks.
--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.
.


User: "Puck Greenman"

Title: Re: OT: Odd Problem! Your help welcome! 16 Jun 2004 01:09:58 PM
On Wed, 16 Jun 2004 06:58:41 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:

Let me explain, he said. (And bear in mind there is a perfectly
sensible explanation for all this).

I have an electric motor. It's a US motor, and works on 110v. It
finally died, taking the transformer with it. So I get a new motor
flown in from Texas, and buy a new transformer, which allegedly
outputs 110v AC stabilised.

Have you considered asking Arco, or some other rewind shop, if they
can rewind the original motor to the same spec, but at 240v?


The new motor incinerates itself. Subsequent checking reveals the
transformer is actually outputting a very steady 124v.

Is that "on load", or "off load"?
The PD will always be a bit higher, off load.

Which explains
why the new motor killed itself.

I wouldn't be too sure of that. 8% is not a huge increase, and should
be well within the motor's handling capability.
8% of a thousand rpm, is 80 revs
Equipment using standard electric motors aint that critical, and
neither is the motor.
Unless it is a cheapo job to start with, with no built in tolerance
Also, most transformers have a slightly over wound primary, to
compensate for poor current, or to protect against over loading.
Actually, there are probably a lot of reasons for it.
So if your transformer is correctly rated, you would have that extra
8% but that still only pushes a 1KW motor to 1080W.
Once again, that should be well within the motors handling capability.
In most cases, people buy the smallest one that they can get away
with, and the current drain pulls the voltage down, without grossly
over heating the transformer.


So, I think about this for a while, and find myself a UK electric
motor. But it's the wrong shape and will not fit into the original
housing. But it does have a rather long drive shaft. So I'm thinking
if I can join one drive shaft to the other, effectively using the UK
motor to turn the US but dead motor, which powers the equipment in
question) I'll have a temporary solution while I sue the crap out of
everyone in sight, particularly the transformer manufacturer.

Another possibility, is a clamp on UJ, of some sort, that way, your
alignment is less critical. I have seen them down to one inch, and
seen very small ones in toys, and tools, so they do make them but I
have no idea where you would start looking, over there. Do you know
anybody who is seriously into building large-ish working models...
.... Or who goes to Brum, regular? Ponds Tools, <or is it just Ponds>,
is opposite the law courts, more or less, and they should know.
You should be able to find them in the directory, or talking pages,
and give them a call
The address is Corporation St. Birmingham.
Well it was, 25 yrs ago.
P.S. sorta.
This has got my curiosity peaked.
A 1/4 inch spindle aint huge, about what I would expect to find on a
domestic sewing machine, or a shower pump, or a domestic electric
drill, and I cannot think of a piece of kit that would be worth the
expense of shipping a motor all the way from the States.
Puck Greenman

#162

BAAWA Knight.

Blesed is the self righteous xtian,
for his is the sure and certain knowledge
that no matter what load of tripe he
comes out with:
God told him to say it.
.



User: "LP"

Title: Re: OT: Odd Problem! Your help welcome! 16 Jun 2004 08:46:38 AM
On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.

Thanks
TW.

Have you checked here, these guys might have a suggestion to solve
your dilemma.
http://www.ducttapeguys.com/
If you have any doubts
http://www.octanecreative.com/ducttape/index1.html
http://www.octanecreative.com/ducttape/sightings/index.html
also:
http://www.octanecreative.com/ducttape/bodyshop/index.html
.
User: "Therion Ware"

Title: Re: OT: Odd Problem! Your help welcome! 16 Jun 2004 09:49:11 AM
On 16 Jun 2004 08:46:38 -0500 in alt.atheism, LP (LP
<whirl_pool@nospam.hotmail.com>) said, directing the reply to
alt.atheism

On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.

Thanks
TW.




Have you checked here, these guys might have a suggestion to solve
your dilemma.
http://www.ducttapeguys.com/

If you have any doubts
http://www.octanecreative.com/ducttape/index1.html
http://www.octanecreative.com/ducttape/sightings/index.html


also:
http://www.octanecreative.com/ducttape/bodyshop/index.html

Heh. Nice.
Alas given the torque, or threat, I don't think it'd be a solution
that'd last for more than 10 seconds.
--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.
.


User: "Christopher A. Lee"

Title: Re: OT: Odd Problem! Your help welcome! 16 Jun 2004 06:55:14 AM
On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:


I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Don't actually join them together. Use a universal joint. I'd suggest
grinding a slot in one and a central flat (like a screwdriver) in the
other. You also need to support both shafts in bushed bearings as
close as possible to this, because long motor shafts are quite whippy.
Model railway people do this sort of thing, but not with shafts quite
that large.
Also the motor driving it needs to be very rigidly mounted, because
any resistence will attempt to turn that rather than the driven shaft.

Suggestions welcome as to a good way to do this.

Thanks
TW.

.

User: "Mike Ruskai"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 02:56:10 PM
On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.

If you don't have a drill press, I wouldn't even try it. And even then,
it'd depend on how long they are (i.e. could you get the end straight up
under the bit?).
I'd measure the exact center of each end, and bore as small a hole as you
can into each. Find a metal pin the same width, and use that to place
them end-to-end at their centers. From there, some kind of chemical
welding compound would likely be the best bet. Or perhaps a blob of
solder, if the metals in question can adhere.
--
- Mike
Remove 'spambegone.net' and reverse to send e-mail.
.
User: "Therion Ware"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 03:30:07 PM
On Tue, 15 Jun 2004 19:56:10 GMT in alt.atheism, Mike Ruskai ("Mike
Ruskai" <spamten.knilhtrae@begonedynnaht.net>) said, directing the
reply to alt.atheism

On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.


If you don't have a drill press, I wouldn't even try it. And even then,
it'd depend on how long they are (i.e. could you get the end straight up
under the bit?).

I'd measure the exact center of each end, and bore as small a hole as you
can into each. Find a metal pin the same width, and use that to place
them end-to-end at their centers. From there, some kind of chemical
welding compound would likely be the best bet. Or perhaps a blob of
solder, if the metals in question can adhere.

Thanks. I know a man with a drill press, so I'll give that a go!
--
"Do Unto Others As You Would Have Them Do Unto You."
- Attrib: Pauline Reage.
Inexpensive VHS & other video to CD/DVD conversion?
See: <http://www.Video2CD.com>. 35.00 gets your video on DVD.
all posts to this email address are automatically deleted without being read.
** atheist poster child #1 ** #442.
.
User: "LP"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 05:33:12 PM
On Tue, 15 Jun 2004 21:30:07 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:



On Tue, 15 Jun 2004 19:56:10 GMT in alt.atheism, Mike Ruskai ("Mike
Ruskai" <spamten.knilhtrae@begonedynnaht.net>) said, directing the
reply to alt.atheism



On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a centimetres
to play with at each end, and they'll be under quite a lot of
rotational stress when in use.

Suggestions welcome as to a good way to do this.


If you don't have a drill press, I wouldn't even try it. And even then,
it'd depend on how long they are (i.e. could you get the end straight up
under the bit?).

I'd measure the exact center of each end, and bore as small a hole as you
can into each. Find a metal pin the same width, and use that to place
them end-to-end at their centers. From there, some kind of chemical
welding compound would likely be the best bet. Or perhaps a blob of
solder, if the metals in question can adhere.


Thanks. I know a man with a drill press, so I'll give that a go!

If you know someone with a lathe, it will do a much better job of
getting the hole in center. If rotational stress is what you are
concerned with then getting the holes centered is important. Also, if
you have access to a lathe, you can square the ends off that will be
joined.
Another option for joining them (after adding the pin) would be to
bevel each end to be joined and then MIG or TIG weld the joint
together.
A third thing you may consider doing is tapping (on a lathe) a
centered hole on each end so that the two pieces can be threaded
together with a short piece of threaded rod before welding.
.
User: "Part_Time_Troll"

Title: Re: OT: Odd Problem! Your help welcome! 15 Jun 2004 11:19:26 PM
LP <whirl_pool@nospam.hotmail.com> in
news:71tuc015bhb53chsl1rbbn7ano1hg6ch8b@4ax.com:

On Tue, 15 Jun 2004 21:30:07 +0100, Therion Ware
<autodelete@city-of-dis.com> wrote:



On Tue, 15 Jun 2004 19:56:10 GMT in alt.atheism, Mike Ruskai ("Mike
Ruskai" <spamten.knilhtrae@begonedynnaht.net>) said, directing the
reply to alt.atheism



On Tue, 15 Jun 2004 20:13:25 +0100, Therion Ware wrote:

I have these two metal rods; one is 5mm in diameter the other 6mm in
diameter. They're solid rods.

I need to join them together, end to end. There's about a
centimetres to play with at each end, and they'll be under quite a
lot of rotational stress when in use.

Suggestions welcome as to a good way to do this.


If you don't have a drill press, I wouldn't even try it. And even
then, it'd depend on how long they are (i.e. could you get the end
straight up under the bit?).

I'd measure the exact center of each end, and bore as small a hole as
you can into each. Find a metal pin the same width, and use that to
place them end-to-end at their centers. From there, some kind of
chemical welding compound would likely be the best bet. Or perhaps a
blob of solder, if the metals in question can adhere.


Thanks. I know a man with a drill press, so I'll give that a go!



If you know someone with a lathe, it will do a much better job of
getting the hole in center. If rotational stress is what you are
concerned with then getting the holes centered is important. Also, if
you have access to a lathe, you can square the ends off that will be
joined.

Another option for joining them (after adding the pin) would be to
bevel each end to be joined and then MIG or TIG weld the joint
together.

A third thing you may consider doing is tapping (on a lathe) a
centered hole on each end so that the two pieces can be threaded
together with a short piece of threaded rod before welding.

depending if space allows additional diameter, try a pipe coupling (or
pipe) as a sleeve across the joint where the rods butt. use epoxy and
maybe intermediate sleeves to fill the gaps.
someone else questioned necessary dynamic qualities of assmebly.
--
Boldly sigging what many have sigged before
.





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